I spoke with a Roland dealer today about purchasing a BN-20, & he highly recommended not to purchase that model for 2 reasons.
1. It clogs up frequently, using more ink. 2. The vinyl paper is unique 20" roll so it can only be purchased from Roland.

He explained that the 30" Versacamm SP-300i would fit our decal needs and save us $ on vinyl paper and ink troubles.

I have no experience in this field, so I was hoping to reach out and confirm what this dealer is saying. I'd appreciate any feedback, thank you.

1) Clogging is frequent due to low use of most BN-20s. It's mostly bought by small home businesses and there's nothing more an inkjet printer hates than little use.
2) Pretty sure you can find a supplier who would slit a 54" or 60" roll in three with little or no cost for you.

BUT (!)

I would not get the BN-20 if I were you. The SP-300i is an excellent unit but it's out of production now. The successor is SG-300 which is an excellent machine. It's fast (many times faster than BN-20) and cuts like a dream. It has a bit higher ink/cleaning fluid consumption due to automated maintenance functions but it's got less issues with dried up wipers etc (it's wiper lays in a vat of cleaning fluid at all times). It's MUCH easier to use and has a higher resale value in case you want to sell it or replace with a newer one at some point of time. Also, the print head is much cheaper in case you need to have that replaced. Media handling is also much easier and more robust.

I'd say go for the SG-300 or if the dealer cuts you a nice deal on SP-300i, get this one.

Wait, SG-300 also has a newer RIP program (VersaWorks Dual) which is better than the old version that comes with the SP-300i.

Hi
BN20 is a great machine for starting out. Roland don't sell media so are you sure that you were talking to a dealer? For budget and space you can't beat it. All printers need regular cleaning, so clogging up is not an inherent issue with the BN20. The SG300 is bigger; better; faster and costlier. Get a demo and choise